[sim] Move WPILib C++ sim implementations out of line (#2598)

This makes the sim classes consistent with the rest of the WPILibC classes.

wpilibc/src/main/native/cpp/simulation/GenericHIDSim.cpp

@@ -0,0 +1,74 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2020 FIRST. All Rights Reserved.                             */
+/* Open Source Software - may be modified and shared by FRC teams. The code   */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#include "frc/simulation/GenericHIDSim.h"
+
+#include "frc/GenericHID.h"
+#include "frc/simulation/DriverStationSim.h"
+
+using namespace frc;
+using namespace frc::sim;
+
+GenericHIDSim::GenericHIDSim(const GenericHID& joystick)
+    : m_port{joystick.GetPort()} {}
+
+GenericHIDSim::GenericHIDSim(int port) : m_port{port} {}
+
+void GenericHIDSim::NotifyNewData() { DriverStationSim::NotifyNewData(); }
+
+void GenericHIDSim::SetRawButton(int button, bool value) {
+  DriverStationSim::SetJoystickButton(m_port, button, value);
+}
+
+void GenericHIDSim::SetRawAxis(int axis, double value) {
+  DriverStationSim::SetJoystickAxis(m_port, axis, value);
+}
+
+void GenericHIDSim::SetPOV(int pov, int value) {
+  DriverStationSim::SetJoystickPOV(m_port, pov, value);
+}
+
+void GenericHIDSim::SetPOV(int value) { SetPOV(0, value); }
+
+void GenericHIDSim::SetAxisCount(int count) {
+  DriverStationSim::SetJoystickAxisCount(m_port, count);
+}
+
+void GenericHIDSim::SetPOVCount(int count) {
+  DriverStationSim::SetJoystickPOVCount(m_port, count);
+}
+
+void GenericHIDSim::SetButtonCount(int count) {
+  DriverStationSim::SetJoystickButtonCount(m_port, count);
+}
+
+void GenericHIDSim::SetType(GenericHID::HIDType type) {
+  DriverStationSim::SetJoystickType(m_port, type);
+}
+
+void GenericHIDSim::SetName(const char* name) {
+  DriverStationSim::SetJoystickName(m_port, name);
+}
+
+void GenericHIDSim::SetAxisType(int axis, int type) {
+  DriverStationSim::SetJoystickAxisType(m_port, axis, type);
+}
+
+bool GenericHIDSim::GetOutput(int outputNumber) {
+  int64_t outputs = GetOutputs();
+  return (outputs & (static_cast<int64_t>(1) << (outputNumber - 1))) != 0;
+}
+
+int64_t GenericHIDSim::GetOutputs() {
+  return DriverStationSim::GetJoystickOutputs(m_port);
+}
+
+double GenericHIDSim::GetRumble(GenericHID::RumbleType type) {
+  int value = DriverStationSim::GetJoystickRumble(
+      m_port, type == GenericHID::kLeftRumble ? 0 : 1);
+  return value / 65535.0;
+}